javax.jdo.annotations

Annotation Type PrimaryKey

@Target(value={TYPE,FIELD,METHOD})
 @Retention(value=RUNTIME)
public @interface PrimaryKey

Annotation on a member to define it as a primary key member of a class or persistent interface using application identity. Also used to define the primary key columns of a secondary table. Corresponds to the xml element "primary-key".

Since:

2.1

Version:

2.1

Optional Element Summary

Optional Elements

Modifier and Type	Optional Element and Description
String	column Name of the column to use for the primary key
Column[]	columns The column(s) for the primary key
Extension[]	extensions Vendor extensions.
String	name Name of the primary key constraint

Element Detail

name

public abstract String name

Name of the primary key constraint

Returns:

the name of the primary key constraint

Default:

""

column

public abstract String column

Name of the column to use for the primary key

Returns:

the name of the column to use for the primary key

Default:

""

columns

public abstract Column[] columns

The column(s) for the primary key

Returns:

the column(s) for the primary key

Default:

{}

extensions

public abstract Extension[] extensions

Vendor extensions.

Returns:

the vendor extensions

Default:

{}